Metallic packing.



unirsi) sriirns' PATENT OFFICE.

GEORGE D. ROLLINS, OF PHILADELPHIA, PENNSYLVANIA.

METALLIC PACKING.

Specification of Letters Patent.

Patented Sept. 11,1906.

Application led May 11, 1905. Serial No,v 259.932.

Pennsylvania, have invented a certain new and useful Improvement in Metallic Pack? ing, of which the following is a specification.

My invention relates to a new and useful improvement in metallic packing, and relates to that class of packing in which sectional rings surround the rod, each ring being held in contact with the rod by a spring or other elastic means surrounding the ring and said rings being held within a longitudinally-divided casing, annular cavities being rovided in thel casing for the reception of t e rings. As ordinarily made each cavity is provided with two rings, and each set of rings is divided from the next set a distance equal to the width of the partitions between the cavities. Thus each ring has a very narrow bearing-surface upon the rod, and when the packing is used to pack rods which rock instead of reciprocate, such as valve-rods for Corliss ene gines, these narrow rings are apt to cut into the rod; and the object of my present invention-is to obviate this disadvantage and still provide an effective, if not more effective, packing than heretofore.

With these ends in view this invention consists in the details of construction and com-` bination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may under stand how to make and use the same, the construction and operation will now be described 4 in detail,referring to the accompanying dra wings, forming a part of this specification, in which- Figure 1 represents a longitudinal section through my improvedpacking; Fig. 2, a crosssection taken on the line 2' 2 of Fig. l; Fig. 3, a cross-section through a modified form of rino.

represents the usual longitudinally-divided casing, which is provided wi th the usual cavities B, separated by the partitions C.

D represents the rings, which are made in sections, preferably three in number, they being divided tangentially or angular-that is, being cut upon any line other than radial. In this construction only one ring lies in each cavity, and each ring is provided with a larger angular groove formed in its periphery, in which lies a spring E for holding the sections of each ring tight against the rod F. Each of the rings D is provided upon one side with the projecting flange G, which surrounds the rod F. This fiange G projects from the side of lthe ring D a distance equal to the width of the partitions C, so as to abut against the next succeeding ring, the partition O being cut away or shortened sufficiently to allow the fiange to come against the next ring. In this way a continuous bearing of the rings upon the rod is formed from one end of the rings-to the other with no space in between, and therefore by the increase of the bearingsurface the rod E will not be cut into by the rings and a more effective packing is also obtained. Each alternate ring is divided into sections upon the same angle; but the other rings are divided upon the opposite angle, as shown in full and dotted lines in Fig. 2, so that the division between the two sections of two succeeding rings can never come in aline- 'ring in each cavity the springs surrounding the rings can be made stronger, and therefore will be more positive in holding the sections of the ring against the rod. When this form of packing is used in connection with the rel,

ciprocating rod, it is also of advantage, as the number of rings being reduced and the spaces between the rings being done away Vwith reduces the number of cutting edges which might be formed tending to reduce the diameter of the rod.

In 3 I have shown a .modified form of ring in which the annular iiange projects from each side of the ring, and these flanges would come in contact with one another instead of the flange upon one ring coming in contact with the body of the other ring.

. Of course I do not wish to be limited to the exact construction here shown, as slight modifications could be made without departing from the spirit of the invention.

Having thus fully described my invention, what I claim as new and useful is- Y 1. In a metallic packing, the combination of the rod to be packed with a casing surrounding the rod, said casing being provided with a number of internal annular cavities, a sectional ring located in each cavity, each. ring being in sections upon an angular line, elastic means surrounding each. ring to hold IOO IIO

the sections against the rod, an annular flange immediately surrounding the rod extending outward from one side of each ring and abutting against the next succeeding ring.

2. In a metallic packing, the combination of the rod to be packed with a longitudinallydivided casing provided with a plurality of internal annular cavities, a sectional ring lo- Acated in each cavity, each ring being divided into two or more sections upon an angular line-tbat is, any line other than radial, each alternate ring being divided upon the saine angle, the other rings bein;71 divided upon an opposite angle, elastic means surrounding the rings tending to force the sections of the rings against the rod, an annular flange immediately surrounding the rod formed with and projecting from one side of each ring an d abutting against the next succeeding ring, as specified.

3. In a metallic packing, the combination with a rod to be packed with a longitudinallydivided casing surrounding the rod, the parts of which are adapted to be secured together, said casing provided with a plurality of internal annular cavities, a sectional ring lccated in each cavity and surrounding the rod, these rings being divided tangentially, each alternate ring being divided upon the same angle, the other rings being divided upon an opposite angle, annular grooves formed in the periphery of each ring, an annular helical spring lying within the groove tending to force the sections ofthe rings against the rod, an annular flange immediately surrounding the rod formed with and extending outward from one side of each ring and abutting against the next succeeding ring, as and for the purpose specified.

4. In a metallic packing, the 'combination of the rod to be packed with a longitudinallydivided casing provided with a plurality of internal annular cavities, sectional rings located in said cavities, elastic means surrounding the rings tending to force the sections against the rod, annular flanges formed on the rings to bridge across the space between the rings occupied by the partitions between the cavities so that a continuous bearing-surface upon the rod is formed from one end of the rings to the other.

5. In a metallic packing, the combination of a rod to be packed with a longitudinallydivided casing surrounding the rod provided with a plurality of internal annular cavities, a sectional ring located in each cavity, each ring being divided into two or more sections upon an angular line-that is, any line other than radial, elastic means surrounding the rings tending to force the sections of the rings against the rod, an annular flange immediately surrounding the rod and formed with and projecting from each side of each ring, said annular flanges abutting against each other to form one continuous bearing upon the rod, as specified.

6. In a metallic packing, the combination of the rod to be packed with a longitudinallydivided casing provided with a plurality of internal annular cavities, sectional rings located in said cavity, elastic means surrounding the rings tending to Jforce the sections against the rod., annular flanges immediately surrounding the rod formed upon each side of each alternate ring and adapted to bridge across the space between the rings occupied by the partitions between the cavities, the annular flanges abutting against the rings without iianges, so that a continuous bearingsurface upon the rod is formed from one end of the rings to the other.

In testimony whereof I have hereunto aflixed my signature in the presence of two subscribing witnesses.

GEORGE D. ROLLINS. Witnesses:

M. E. IIAMER, L W. MonRIsoN. 

